Html node attribute operations, html node attributes
<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN "" http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd "> <Html xmlns =" http://www.w3.org/1999/xhtml "> <Head> <title> new document </title> <meta http-equiv =" Content-Type "content =" text/html; charset = UTF-8 "/> <meta name =" author "content =" "/> <style type =" text/css "> </style> <script type =" text/ javascript "> // when the webpage is loaded, call the js program // anonymous function: A function without a name cannot be defined separately or called independently. // an anonymous function can only be passed as data to other variable windows. onload = function () {// find the img node var imgObj = document. body. firstChild; // Add the src attribute imgObjAttribute ("src", "images/01.jpg"); // Add the width attribute imgObj. setAttribute ("width", "500"); // Add the border attribute imgObj. setAttribute ("border", 2); // Add the onclick attribute imgObj. setAttribute ("onclick", "removeImg (this)");} // Delete the src attribute function removeImg (imgObj) {imgObj. removeAttribute ("src");}/* anonymous function call and assign different values to the variable as data // The variable is of different types. // assign a function to the variable, then the variable is the function type var a = "abc"; var a = [10]; var a = function () {alert ("OK") ;}// call method: a (); */</script>
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